diff --git a/components/lwp/arch/aarch64/cortex-a/lwp_gcc.S b/components/lwp/arch/aarch64/cortex-a/lwp_gcc.S
index e1396522056ac8e859a38290e55f3db62a42f498..ccd3254255a7cb89b6b8124fb4d82c44efed48d5 100644
--- a/components/lwp/arch/aarch64/cortex-a/lwp_gcc.S
+++ b/components/lwp/arch/aarch64/cortex-a/lwp_gcc.S
@@ -123,8 +123,15 @@ set_user_context:
     str x1, [x2, #4]
     ldr x1, [x0, #8]
     str x1, [x2, #8]
+
+    mov x3, x2
+    dc cvau, x3
+    add x3, x3, #8
+    dc cvau, x3
+    dsb sy
     ic ialluis
     dsb sy
+
     msr sp_el0, x2
     ret
 /*
@@ -361,12 +368,15 @@ user_do_signal:
     str w1, [sp]
     ldr w1, [x0, #4]
     str w1, [sp, #4]
-    ic ialluis
-    dsb sy
 
     mov x9, sp /* lwp_sigreturn */
     mov x0, sp
 
+    dc cvau, x0
+    dsb sy
+    ic ialluis
+    dsb sy
+
     msr spsel, #1
 
     mrs x1, elr_el1
diff --git a/components/lwp/arch/arm/cortex-a/lwp_gcc.S b/components/lwp/arch/arm/cortex-a/lwp_gcc.S
index 2c0d78abc1377d6326580e204c30ee97d4a76edd..e1240ad1b3fc43091e70f998dacad79b51b0df9e 100644
--- a/components/lwp/arch/arm/cortex-a/lwp_gcc.S
+++ b/components/lwp/arch/arm/cortex-a/lwp_gcc.S
@@ -56,10 +56,21 @@ set_user_context:
     str r1, [sp, #4]
     ldr r1, [r0, #8]
     str r1, [sp, #8]
-    mov lr, sp
-    mov r0, #0
+
+    mov r1, sp
+    mcr p15, 0, r1, c7, c11, 1   ;//dc cmvau
+    add r1, #4
+    mcr p15, 0, r1, c7, c11, 1   ;//dc cmvau
+    add r1, #4
+    mcr p15, 0, r1, c7, c11, 1   ;//dc cmvau
+    dsb
+    isb
     mcr p15, 0, r0, c7, c5, 0   ;//iciallu
     dsb
+    isb
+
+    mov lr, sp
+    mov r0, #0
     cps #Mode_SVC
     mov pc, lr
 
@@ -201,10 +212,17 @@ lwp_check_debug:
     str r1, [sp]
     ldr r1, [r0, #4]
     str r1, [sp, #4]
-    mov r0, #0
+
+    mov r1, sp
+    mcr p15, 0, r1, c7, c11, 1   ;//dc cmvau
+    add r1, #4
+    mcr p15, 0, r1, c7, c11, 1   ;//dc cmvau
+    dsb
+    isb
     mcr p15, 0, r0, c7, c5, 0   ;//iciallu
     dsb
     isb
+
     mov r0, sp /* lwp_debugreturn */
     cps #Mode_SVC
 
@@ -257,9 +275,16 @@ user_do_signal:
     str r1, [sp]
     ldr r1, [r0, #4]
     str r1, [sp, #4]
-    mov r0, #0
+
+    mov r1, sp
+    mcr p15, 0, r1, c7, c11, 1   ;//dc cmvau
+    add r1, #4
+    mcr p15, 0, r1, c7, c11, 1   ;//dc cmvau
+    dsb
+    isb
     mcr p15, 0, r0, c7, c5, 0   ;//iciallu
     dsb
+    isb
 
     mov r5, sp  ;//if func is 0
     mov lr, sp
diff --git a/components/lwp/lwp_signal.c b/components/lwp/lwp_signal.c
index 0ec1c6eb0e560ff4476d36e741fa6ad82669998e..33eb0d6a778d055d9a3ee5fcaaf4583f5a1f9bed 100644
--- a/components/lwp/lwp_signal.c
+++ b/components/lwp/lwp_signal.c
@@ -303,6 +303,11 @@ lwp_sighandler_t lwp_sighandler_get(int sig)
     }
 out:
     rt_hw_interrupt_enable(level);
+
+    if (func == (lwp_sighandler_t)SIG_IGN)
+    {
+        func = RT_NULL;
+    }
     return func;
 }